Brake beam mounting



E. G. BUSSE BRAKE BEAM MOUNTING Filed Nov. 13, 1942 2 Sheets-Sheet l INVENTORI;

EDWIN G. Bus-5E BY M AT ORNEY Patented Oct. 3, 1944 BRAKE BEAM MOUNTING Edwin G. Busse, Chicago, Ill., assignor to Chicago Railway Equipment Company, Chicago, Ill., a corporation of Illinois 1 Application November 13, 1942, Serial No. 465,402

17 Claims.

pended, thus avoiding strain and wear upon the hanger and the parts to which it is connected. Such movement results from the longitudinal play of the wheels and axles in the journal boxes and from the play of the journal boxes in the truck frame pedestals. Obviously, if the beam,

which is usually suspended from the frame, cannot move with the axle and wheels, the shoes will not be applied properly to the wheel tread and may be forced against the wheel flange or ride off of the edge of the wheel, or the head and hanger may be subjected to lateral thrusts, causing undue wear on the wheels, brake shoes, hangers and hanger bearings and tending to breakage of one or more parts. This condition is accentuated when the preferred box type of hanger is used because of the elongated bearing of the cross bars of the hanger in the brake head and in the support bracket. With such hangers and with heavy beams, it is almost impossible to move the beam lengthwise relative to the side frame.

Various attempts have been made to meet the difficulty referred to. One example is shown in H. A. Hoke Patent 1,166,521, in which the legs of a box type hanger are made thin enough to flex transversely of their length. Another example is shown in C. K. Pickles Patent 817,871, which discloses a dumb-bell type of hanger provided with a ball at each end seated in a corresponding socket in the brake beam and support. Another arrangement is described in F. Schaefer Patent 1,709,907, in which parallel hanger legs are individually pivoted at their ends upon separate cross members. Numerous variations of these different arrangements are shown in the art.

The present invention contemplates a simple,

inexpensive and effective structure for attaining the result of these relatively expensive structures.

A more specific object of the invention is to accommodate the lateral movement of the brake beam relative to the frame from which the beam is supported by a box type hanger without any change in the body of the hanger as in general use.

These and other detail objects as will appear below are attained by the structure illustrated in the accompanying drawings, in which- Figure 1 is a top View sectioned horizontally in part of a portion of a truck frame and wheel with a brake shoe applied thereto and supported from the brake frame.

Figure 2 is a side elevation of the same structure sectioned in part along the line 2-2 of Figure 1.

Figure 3 is a transverse vertical section taken approximately on the line 33 of Figure 2v and drawn to an enlarged scale.

Figure 4 corresponds to Figure 3 but illustrates another form of the invention comprising a double bushing.

Figure 5 is a vertical cross section through the middle of a cross bar and double bushing arrangement similar to that shown in Figure 4 but including a modified inner bushing.

The wheel 1, shown in Figures 1 and 2, is mounted on an axle 2 journalled in box 3 upon which the truck frame 4 is carried. The frame includes a bracket 5 open at one side to receive the upper end of the rigid brake hanger 6 which is of the desirable rectangular or box-like contour (see Figure 3) with side legs 6a and upper and lower cross bars '61) and having the usual contours. The hanger suspends the brake beam B from the frame.

A U-shaped bushing l is provided for the upper cross bar 6b and has an interior periphery receiving the crossbar and contacting the lower portion of the cross bar substantially from end to end of the latter to form an extended bearing on which the hanger may swing about its axis during the application and release of the brakes, as indicated by the full lines and broken lines in Figure 2. The exterior periphery of bushing l is enlarged in diameter between the ends of the bracket recess and substantially intermediate the ends of the cross bar and is rounded transversely of its legs throughout their length, as indicated at 1a, and is received in similarly rounded depressions 8 in bracket 5. Hence the hanger may tilt freely in the bracket, as indicated in broken lines in Figure 3, to accommodate lengthwise movement of the beam transversely of the frame.

With this arrangement, the interengaging surfaces of the hanger cross bar and the bushing and of the bushing and the bracket comprise cylinder segments 6d, 10 and 1a, 8 respectively with the axis of one pair of interengaging surfaces extending at right angles to the axis of the other pair of interen-gaging surfaces. Wear on the surfaces is distributed over a large area, and this fact, coupled with the absence of undue pressure at any one point, because of the combined swinging and tilting actions, tends to prolong the useful life of the parts and to avoid likelihood of breakage. The bushing is retained in the bracket by a suitable bolt l2 inserted through apertures in bracket 5, there being sufiicient clearance between the bolt and the sides of the slots therefor in the bushing to accommodate the tilting of the bushing in the bracket.

Obviously, a similar swinging and tilting connection is desirable at the lower end of the hanger where it is connected to the brake beam head 9. Accordingly a U-shaped bushing I is slipped over the hanger lower cross bar 60 and is fitted within the hanger recess H in the brake head. As in the arrangement at the upper end of the hanger, there is provided an extended cylinder segment bearing between the cross bar and the bushing and between the bushing and the brake head, the axes of the bearings extending at right angles to each other and freely accommodating the swinging and tilting movements of the hanger relative to the associated part.

While the arrangement shown in Figures 1-3 does not involve any departure from the usual hanger structure, it does require a departure from the usual contour of the hanger recess in the bracket and brake head.

Figure 4 illustrates another form of the pres ent invention in which these contours remain unchanged. This is accomplished by providing a double bushing between each cross bar of the hanger 20 and the corresponding frame bracket 2! and brake head 22. The double bushing for the upper cross bar comprises an outer section 23 and an inner section 24, the outer section having an exterior periphery which consists of straight line elements from side to side of the bracket and the inner periphery of which is concave and tapered, as indicated at 25 and 25, to accommodate tilting of the inner section 24 transversely of the truck. The exterior periphery of section 24 is shaped, from side to side of the bracket, like the exterior periphery of bushing I (Figure 3) and the section encloses the hanger cross arm 20a and provides an extended bearing for the swinging of the latter during application and release of the brakes.

The double bushing structure between the hanger lower cross bar 2912 and the brake head includes an outer section 2'! and an inner section 28 corresponding generally to the structure shown at the upper end of the hanger.

Figure illustrates a double bushing arrangement similar to that shown in Figure 4 except that the inner bushing 29 has the ends 38 of its legs bent inwardly to engage the right hand face of the cross bar 3| of the hanger 32 and the cross bar 33 of bushing 29 is flattened against the left hand face of cross bar 3| of the hanger. With this arrangement, the cross bar and inner bushing 29 may swing as a unit in the outer bushing 34 about the axis of the cross bar or tilt at right angles to that axis. The bushing structure is retained in the bracket 35 by a bolt 36.

In both forms of the invention the bushing parts may be replaced at intervals to maintain close fits and avoid undue play between the parts in a manner similar to renewable bushings previously used for brake hangers. The bushing parts or some of them may be of hard metal to resist wear or of soft metal to avoid wear of the associated part. They may be of spring material to better maintain their seat against the jaw in which they are inserted. Other arrangements in which the general objects of the present invention are attained are described in a copending application in the name of Irvin J. Spaeth, Serial No. 465,403, filed of even date herewith. Other variations in detail of construction may be made without departing from the spirit of the invention, and the exclusive use of such modifications coming within the scope of the claims is contemplated.

What is claimed is:

1. In a railway brake beam mounting, a onepiece box-type brake hanger including a substantially horizontal bar, a bushing receiving said bar and opening transversely of the axis of the bar to accommodate assembly with the bar, the hanger being arranged to swing from said bushing and about the axis of the bar, during application and release of the brakes, an associated jaw including a substantially horizontal bearing for said bushing and opening transversely of said axis to accommodate assembly with the bushing, said bushing being arranged to tilt in said jaw in a general plane extending transversely of the general plane of the swinging movement of said bar in said bushing, to ac commodate tilting of the hanger when the beam moves lengthwise relative to the support jaw.

2. In a railway brake beam mounting, a rigid box-type swing hanger including a transverse upper cross bar member, a bushing member supporting said cross bar member, a, truck main part bracket member supporting said bushing member, the interengaging surfaces of two of said members comprising cylinder segments parallelling the axis of said cross bar member and the interengaging surfaces of another two of said members comprising cylinder segments extending transversely of said axis and intermediate the ends of said cross bar member and providing for tilting of the hanger transversely of the plane of its swinging movement.

3. Support structure for the usual brake beam box-type hanger consisting of a horizontally disposed U-shaped member forming a bearing on its lower leg for a cross bar of the hanger, to accommodate swinging of the latter when the brakes are applied and released, and a horizontally disposed U-shapecl jaw receiving said member and providing a bearing on its lower leg for the lower leg of said member, the member being tiltable in the jaw in a direction transverse of the general plane of the swinging movement of the hanger in the bearing, to accommodate shifting of the beam. lengthwise and relative to the 4. In a brake beam mounting, a one-piece boxtype hanger including av cross bar, a member open at one side to receive the cross bar and accommodating the swinging of the hanger during application and release of the brakes, and an associated part open at one side to receive said member, a portion or said member between the ends of the cross bar being enlarged in exterior diameter and forming a pivot about which the cross bar and member may tilt as a unit transversely of the general plane of the swinging movement of the hanger on the associated part during lengthwise movement of the beam relative to the hanger support.

5. A two-part bushing for assembling a brake hanger, having a cross bar, with another member, comprising an inner U-shaped section'into which the hanger cross bar may be inserted, one of the legs of the section forming an elongated bearing for the hanger cross bar extending transverselyof the leg and on which the hanger may swing about the axis of the cross bar, and an outer U-shaped section for insertion into the other -member and into which the inner section is fitted and including a leg forming an elongated bearing for the inner section extending longitudinally of said first-mentioned leg and on which the inner section and the hanger cross bar may tilt transversely of the axis of the cross bar bearing.

6. In a railway brake beam mounting, a brake hanger including asubstantially horizontal bar, a support jaw including a substantially horizontal bearing, a two-part bushing seating said bar in said jaw, the inner part of said bushing providing an elongated bearing for said bar extending longitudinally of said bar so that said bar may pivot thereon during the application and release of the brakes, and the outer part of said bushing providing an elongated bearing for said inner part extending transversely of said bar so that said bar and inner part may tilt as a unit on said outer part transversely of the direction of the pivoting action of said bar to accommodate lengthwise movement of the beam relative to the support jaw.

7. As a new article of manufacture, a bushing for assemblin a brake hanger, having a cross bar, with an associated part, comprising a U- shaped member, the inner face of one of the legs of the U being substantially straight from side to side to provide an extended bearing for-the hanger cross bar, upon which the latter may swing about its axis, and the outer face of said leg being rounded from side to side to accommodate tilting of the member transversely of its length in the associated part.

8. As a new article of manufacture, a bushing for assembling a brake hanger, having a cross bar, with an associated part, comprising a U-shaped member, the inner face of one of the legs of the U being substantially straight from side to side to provide an extended bearing for the hanger cross bar, upon which the latter may swing about its axis, and the outer face of said leg being rounded from side to side substantially throughout its length to provide an extended straight line surface on which the member may tilt transversely of its length in the associated part.

9. A support structure for a railway brake beam box-type hanger comprising a truck side frame bracket forming .a U-shaped jaw having its legs extending longitudinally of the frame,

.and a similarly shaped bushing within said jaw with its lower leg extending along and seated on the lower leg of said jaw, the bushing being tiltable on the jaw leg in a direction transversely of the side frame and being arranged to pivot-' ally support a brake beam hanger so that it may swing freely parallel to the side frame.

10. A support structure for a railway brake beam box-type hanger comprising a truck side frame bracket forming a U-shaped jaw having its legs extending longitudinally of the frame, a similarly shaped bushing fitting snugly in said jaw and having an arcuate recess in the upper face of its lower leg extending longitudinally of the jaw and parallel to the side frame, and a liner in said bushing having a, longitudinally extending bulge in the lower face of its lower leg fitting in said recess so that the liner may tilt on the bushing transversely of the side frame, 7

the liner having an extended horizontal surface to pivotally support a brake beam hanger so that it may swing freely parallel to the side frame.

11. In a brake beam mounting, a railway brake beam head having a recess extending inwardly from its shoe mounting face, there being a U- shaped bushing seated in said recess and arranged to receive the cross bar of a box-type hanger and to pivot thereon in a plane perpendicular to the beam, the bushing and upper side of the head recess being shaped to accommodate tilting of the bushing, and a hanger cross bar thereon, in an upright plane extending longitudinally of the beam, whereby longitudinal shifting of the beam relative to the hanger support is accommodated.

12. In a brake beam mounting, a, railway brake beam head having a recess extending inwardly from its shoe mounting face, there being a U- shaped bushing fitting snugly in said recess and having an arcuate recess in the lower face of its upper leg extending longitudinally of the recess and transversely of the general plane of said shoe mounting face, and a liner in said bushing having a bulge in the upper face of its upper leg fitting in said arcuate recess so that the liner, and a hanger cross bar therein, may tilt on the bushing in an upright plane extending longitudinally of the beam, whereby longitudinal shifting of the beam relative to the hanger support is accommodated.

13. A railway brake beam mounting comprising a one-piece box-type hanger including a cross bar, a U-shaped bushing detachably receiving said cross bar through its open end and forming a bearing from which the hanger may swing about the axis of the cross bar during application and release of the brakes, there being an element on said cross bar forming a pivot upon which the hanger may tilt in said bushing transversely of the general plane of the swinging movement of the hanger to accommodate lengthwise movement of the beam relative to the hanger support.

14. In combination, a railway truck side frame having a brake hanger bracket, a one-piece boxtype hanger suspended from said bracket, a brake beam carried by said hanger and including a brake head, individual bushings opening transversely of the length of the hanger to receive its upper and lower cross bars respectively, each bushing providing an extended bearing for the associated cross bar and accommodating swinging of the hanger and beam during the application and release of the brakes, said bracket and brake head having U-shaped recesses opening transversely of the length of the hanger to respectively receive said individual bushings, the opposing faces of said bushings and recesses including elements. providing pivots for the tilting of the bushings transversely of the side frame and longitudinally of the beam to accommodate relative movement of the beam transversely of the side frame.

15. A mounting device for a railway brake beam one-piece box-type swing hanger, comprising an inner member open at one side for receiving a hanger cross bar and forming a cylinder segment bearing therefor, and an outer member open at one side for receiving said inner member and seating the same in a supporting bracket, and interengaging surfaces of said members comprising cylinder segments extending transversely of the axis of said bearing and intermediate the ends thereof and providing for tilting of the inner member, and a hanger supported thereby on the outer member in a direction transversely of the plane of the swinging movement of the hanger on the bearing.

16. A two-part bushing for assembling a brake hanger, having a cross bar, with a supporting bracket having an open-sided recess, comprising a hanger-engaging section having a concave inner face for receiving the hanger cross bar and with which the hanger may pivot about the axis of its cross bar, said section having a convex outer face with its axis extending transversely of the axis of its concave inner face, and a bracket-engaging section U-shaped for insertion into the open side of the bracket recess and having a concave inner face rforming a bearing for said convex face of the hanger-engaging section and on which the latter may tilt in a direction transversely of the axis of the hanger cross bar.

17. In a railway brake beam mounting including a one-piece box type brake hanger having a substantially horizontal bar, a bushing receiving said bar and opening transversely of the bar to accommodate assembly with the bar, an associated jaw including a substantially horizontal bearing for said bushing and opening transversely of the bar to accommodate assembly with the bar and bushing, the interengaging elements of the structure providing for the swinging of the hanger during application and release of the brakes about the axis of said bar and for the tilting of the hanger in a general plane extending longitudinally of said axis to accommodate inclination of the hanger when the beam moves lengthwise relative to the support EDWIN G. BUSSE. 

